Hey Frog,
yes i agree but usually i find at least in my corner of the world when i get a customer referencing pantone, that is just the tip of the iceberg and there is a lot more to be discovered below the surface.
At this point in my multi hundred dollar business empire customers get a chance to pick their colors from my stock of ink available at the time of thier inquiry. i will tweak a color a little bit but very little but when they try to determine the variables between the ink i have and the PMS they remember from their computer I suggest they consult with a shop offering a broader spectrum of abilities.
https://media.giphy.com/media/A5qaYXFGgGWg8/giphy.gifmooseman